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蔓叶线
Author:
Sylvie
GeoGebra
New Resources
平行線的判定
圓的基本性質
中华人民共和国国旗
活动三：应用性质
第八周作业2
Discover Resources
三角形的心
鋪磁磚練習
碎形
串珠
構作對稱圖形
Discover Topics
Arithmetic
Pythagoras or Pythagorean Theorem
Surface
Quadratic Functions
General Quadrilateral